Another example of a Baltic viking (period) penannular brooch. This one was found in Latvia, and is a relatively "common" known type from that area. The state of preservation of this example though is of museum quality...
Reference ro these kind of zoomorphic brooches:
Zoomorphic penannular brooches of the Viking Period are well-documented (e.g. Kilbride-Jones, H. Zoomorphic Penannular Brooches, Society of Antiquaries, London, 1980)
The fourth stirrup strap mount is a British find and a rare type in the (Anglo-Scandinavian) Urnes style with entwined beasts, measuring 45 mm x 38 mm